Visual Studio 2010 Beta 2 does not support Smart Device Development.

Microsoft is committed to making Visual Studio a great development tool for the mobile device developer, and will deliver mobile device tools for Visual Studio 2010, but cannot share details now. For existing Visual Studio 2008 mobile developers, Microsoft released the Windows Mobile 6.5 Developer Tool Kit that works with the Windows Mobile 6 SDK.

Because Visual Studio 2010 Beta 2 does not support Smart Device Development, you cannot use the following features: .NET Compact Framework projects, Visual C++ device projects, smart device CAB projects, Device Emulator and Device Emulator Manager, testing tools for device projects, and Device Security Manager.

Smart device development is still supported in earlier versions of Visual Studio, such as Visual Studio 2008. For the more information about smart device projects, see Windows Mobile Developer Center and Smart Device Development in Visual Studio 2008. 

Note

Visual Studio also supports a different kind of device development known as Mobile Web development with ASP.NET. Mobile Web development refers to the development of mobile Web applications that run on a Web server and are rendered in different formats on a variety of browser-equipped mobile devices. For more information about Mobile Web development, see Developing ASP.NET Web Sites for Mobile Devices.